Sawmill-dog



- Patented Nov. 22, |898. A. D. LANE. sAwmlLl nos. (Application led June10, 1898.)

(No Model.)

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UNITED STATES PATENT OFFICE.

AL ERT D. LANE, MONTPELIER, VERMONT.

sAwMlLL-Doe.

SPECIFICATION forming part of Letters Patent No. 614,81 5, datedNovember 22, 1898.

Application filed June 10l 1898. Serial No. 683,126. (No model.)

T0 @ZZ whom t may concern.'

Be it known that I, ALBERT D. LANE, of Montpelier, in the county ofNVashington and State of Vermont, have invented a new and ImprovedSawmill-Dog, of which the following is a full, clear, and exactdescription.

My invention relates to an improved sawmill-dog, and has for its objectto securely hold crooked logs while being slabbed or straightened.

My invention comprises the novel features hereinafter described andclaimed.

Reference is to be had to the accompanying drawings, forminga part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure l is a side elevation of a sawmillcarriage, showing my improveddog applied thereto. Fig. 2 is a cross-sectional view through the guidecarrying the dog. Fig. 3 is a sectional plan view of part of the same,and Fig. 4 is a sectional end elevation of the same.

In sawing crooked logs it is difficult to use ordinary dogs to hold thelog securely, so as to prevent it rolling. With my device two dogs areused, one enga-ging the log from the under side and the other from theupper side, and both are readily adjustable in height to suit anyrequirement.

In the drawings, A represents the body of any ordinary-sawmill-carriage, and A' the knees employed in connection therewith tohold the log in position. Mounted upon this carriage, at any suitablepoint, is a knee B, upon which my improved dog is secured. This knee isprovided with bearings at top and bottom, receiving a hollow guide C andpermitting said guide to turn upon its axis. This guide C is preferablyformed as a tube, having a slot C on one side thereof. To the lower endof the guide is attached an arm L, and to this arm is attached a springL', having its other end connected with the carriage, the two acting toturn the guide backto such a position that the dogs are normallyinoperative.

Within the tube C, forming the guide, is

y mounted a rod D, so that it may slide freely therein. This rod hasrackteeth D formed in one side thereof and projecting slightly into theslot C in the guide, and thus pre- -an operating-pinion.

venting the rod from turning in the guide. rlhe lower end of the rod Dis also provided with a side extending arm CZ, having its end turnedupwardly and forming one of the dogs for engaging the log.

Mounted to slide upon the tube C, forming the guide, is a slide-block E,which has arms E' extending from one side thereof and separatedsufciently to receive between them Mounted in the projecting arms of theslide is a shaft F, which carries thereon the operating-pinion G,adapted to mesh with the rack, said shaft also carrying a locking-pinionI. The shaft F is journaled in a recess formed in the upper side of oneof the arms E', said recess being covered by a cap or plate e, securedto the arms by bolts. This permits the shaft and pinion to be removed bylifting the shaft out after the cap e has been removed.

In order to furnish abearing for the oppositeside of the pinion G, theshaft F is made hollow, and a bolt Il is extended through the same, thehead H of the bolt being utilized as the bearing in the arm E upon thisside of the pinion G. As herein shown, the head H is made conical,although this feature is not essential. By this means the pinion G issupported upon both sides, and the shaft carrying the same is madereadily removable, and no portion projects to such a distance as tointerfere with the saw.

Upon the outer ends of the arms E is fixed a dog K, the point of whichextends downwardly and opposite the dog d. The lockingpinion I isengaged, if necessary, by a pawl J, pivoted upon one of the arms E. Thispawl is weighted so that normally it will drop out of engagement withthe pinion. If the guide C and the slide E,surrounding the same, be madeof sufficiently light material, the spring of the parts will causev themto bind to such an extent as to hold the two dogs d and K in adjustedposition without using the pawl J. The latter is, however, provided forsafety and to insure that there will be no slip under any conditions.

In using my device the log, which is represented in the drawings by M,is placed in position against the knees A and the knee B. The hand-wheelF', which is mounted on one end of the shaft F, is then engaged, and theIOO device is swung around until the dogs d and K are in position toengage the log. The hand-wheel is then turned so as to cause the twodogs to be drawn toward each other, and thus to engage opposite sides ofthe log. The dogs are to be forced into the log by turning the wheel Funtil a firm engagement has been secured. If necessary, in order toretain the dogs in their position the pawl J is thrown down intoengagement with the pinion I. In most cases, however, this will not benecessary. The two dogs engaging the log from the top and bottom holdthe same securely and prevent the possibility of its removal. Then thelog has been slabbed and it is desired to turn it, the dogs may beloosened either by giving the hand-wheel a slight backward rotation orin many cases by knocking out one end of the log. Vhen the dogs havebeen released, the hand device is swung back into inoperative positionby means of the spring L', acting upon the arm L. The dog ordinarilyused for holding the log will then be brought into operation for holdingthe log while sawing.

The use of this dog will enable crooked logs to be securely held, whichwould not be possible with the ordinary dogs. It will thus save a greatdeal of time and make it possible to utilize much lumber which wouldOtherwise be too crooked, and also prevent the possibility of accidentin sawing crooked logs while endeavoring to hold them by the ordinarydogs.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A sawmill-dog, comprising a vertical guide-tubemounted to turn, and having a longitudinal slot in one side, a barsliding within the tube and having an upwardlypointed dog extendingoutward from its lower end, a rack upon one side of the rod and enteringthe slot in the tube and preventing its turning therein, a slidesurrounding the tube and carrying a dog opposing the one on the rod, apinion mounted in the slide and engaging the rack, and means for turningthe pinion, whereby the two dogs may be drawn toward each other, orseparated.

2. A sawmill-dog, comprising a vertical guide-tube mounted to turn, andhaving alongitudinal slot in one side, a bar sliding within the tube andhaving an upwardlypointed dog extending Ou tward from its lower end, arack upon one side of the rod and entering the slot in the tube andpreventing its turning therein, a slide surrounding the tube andcarrying a dog Opposing the one on the rod, a pinion mounted in theslide and engaging the rack, means for turning the pinion, whereby thetwo dogs may be drawn toward each other or separated, and a lock forsaid pinion.

3. A sawmill-dog, comprising a vertical guide-tube mounted to turn, andhaving a longitudinal slot therein, a bar sliding in the tube and havingrack-teeth entering the slot and an upwardly-pointin g dog extendingoutwardly from its lower end, a slide embracing the tube, a dog thereonopposing the other dog, a hollow shaft mounted in the slide, ahand-wheel and a pinion on the shaft, the pinion engaging the rack, anda rod passing through the shaft and projecting at one end to form abearing for one side of the pinion in the slide.

4. A sawmill-dog,com prisin g a rack mounted to slide longitudinally andhaving a dog attached thereto, a connected pinion, hollow shaft andl1andwheel,the pinion being adapted to engage the rack, a slide havingtwo arms adapted to receive the pinion between them, one arm having aslot adapted to form a bearing for the shaft and the other arm having ahole Opposite said bearing, and a bolt entering the pinion end of theshaft and the hole in the arm and forming a support for this side of thepinion.

5. A sawmill-dog-operating device, comprising a hollow shafthavingapinion on one end and a hand-wheel on the other, a supporttherefor consisting of two arms lying close alongside the pinion and onopposite sides thereof, one arm having a side opening-slot receiving theshaft, a cap for confining the shaft in the slot, the other arm having ahole in line with the shaft, and a bolt passing through said hole andthe hole in the shaft and formin gan outboard support for the shaft.

ALBERT D. LANE.

Vitn esses:

II. L. REYNOLDS, EVERARD BOLTON MARSHALL.

IOO

